LD阵列半环形对称抽运的固体激光器  

Semi-circumferential LD arrays symmetrically-pumped solid-state lasers

作　　者：郭云霄[1] 巩马理[1] 薛海中[2] 翟刚[3] 李晨[1] 闫平[1] 柳强[1] 陈刚[1] 

机构地区：[1]清华大学精密仪器系光子与电子技术研究中心,北京100084 [2]西安电子科技大学技术物理学院,西安710071 [3]西南技术物理研究所,成都610041

出　　处：《激光技术》2007年第1期1-3,88,共4页Laser Technology

摘　　要：为解决激光晶体传导冷却与输出光束能量分布对称性之间的矛盾,针对半导体激光器(LD)抽运高功率固体激光器,提出了半环形侧面对称抽运的方式。对多LD阵列同时抽运激光晶体的吸收与增益情况进行了计算,并在实验中予以验证,采用半环形对称抽运的方式,在20Hz的工作频率下,以总抽运单脉冲276m J的能量获得最大63.6m J的圆形对称脉冲激光输出,斜效率34%。实验结果表明,采用对称抽运结构能够有效地改善输出光束的空间分布,获得较为对称的激光输出。To reduce the asymmetry of the output laser beam caused by the geometry of the conduct-cooled laser crystal in side pumped solid-state lasers, two pump modules were symmetrically placed and a semi-circumferentially mounted LD arrays were taken in each pump module. Numerical calculation and experiment were made, a maximum output power of 63.6mJ was gotten with 276mj pump power at a frequency of 20Hz, the slope efficiency was 34%, Both numerical and experimental results prove the symmetrical geometry can effectively improve the beam quality and approximate symmetrical laser distribution can be obtained.

关 键 词：激光器 侧面抽运 激光晶体 对称 半导体激光器 

分 类 号：TN248.1[电子电信—物理电子学]